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( <br /> I � �lulch i, .ih�ac. rryinrcd fnr .crdin�. \9ul.h c,:n i.r a�•�,lic�i ��n t��� ��I <br /> thc sccd or simultancoutily h�� hydic�sccding. <br /> ( . On stecp slopcs, L3ondcd Pibcr\7atrix (BFNI)or A4cchanically Bondrd <br /> I Pibcr h1au•ix (\4I31��4) productti should bc uscd. f31�'�1/MIiPM <br /> products are applicd at a minimum ratc of 3.000 pounds per acrc nf <br /> I mulch ���ith approximatch- 10 perccnt tackitier. Application is madc <br /> so that a minimum of 95 perecnt soil coverage is achie�•ed. Numcrous <br /> products are a��ailablc commerially and should be inslalled p�r <br /> 1 manufactw�cr's insu-uctions. Mnsi products requirc ?4-3G hows tc� <br /> cure beforc a rainfall and camiot be inst7llC(I OIl \5'CI OI'S81p1'31C(I SOIIti. <br /> Gcncrally, thesc producis comc in 40-SU pound ba6s and includc all <br /> � neccssaiy ingrcdicnts exccpt for sced und �enilizcr. <br /> E31=Ms and MBFMs havc somc advantagcs ovcr Ulankcts: <br /> � • No sw•facc preparation rcquired; <br /> • Can bc installed via helicopter in remote arr.�s: <br /> ' • On slopcs stceper than 2.5:1, blanket ins�allcrs mar nccd to bc ropcd <br /> and hamcsscd for safcry; <br /> � • 1'hcy are at Icast 51,000 per acrc chcaper installcd. <br /> ln most cascs, ihc shcar su•cnglh of Ulankets is not a I��ctor�vhcn used on <br /> slopes, ouly �vhen uscd in chmmels. I3FMs and MIIFMs are good <br /> ( alteivatives to blankets in most situations where vegetation establishment <br /> is the goal. <br /> ' . �Vhcn inslalling sccd via hydrosecding operations,only about 1/3 of <br /> thc sccd actually cnds up in contact wilh thc soil surfacc. "1'his rcduccs <br /> thc abiliry to eslablish a good stand of grass quickly. Onc �vay iu <br /> � ovcrcome this is to incrcase sced quantitics by up to SO percen:. <br /> . Vegctation establishment can also be enhanced by dividing thc <br /> hydromulch operation into two phases: <br /> I 1. Phasc 1- Install all sceJ and fcrtilizer with 25-30 percent mulch <br /> and tackificr onto soil in the fitst lift; <br /> � ?. Phasc 2- Install thc rest of the mulch and tackifier over the first lili. <br /> An altemative is to install the mulch, sced, fcrtilizcr, and tackifier in onc <br /> � liti. '1'hen, spread or blow straw over the top of thc hydromulch at a ratc of <br /> about 800-1000 pounds per acrc. Hold slraw in placc with a slandard <br /> tackitier. Both of these apptnaches will increase cost moderatcly but �vill <br /> greaQy improvc and cnhmuc vcgetativic establishment. The increased cost <br /> Im�y hc nffset by thc rcduccd nccd For: <br /> I. In�igation <br /> I _ 2. Rcapplicationofmulch <br /> 3. Rcpnir of Cailed slop�surfaces <br /> 1 February 2005 Volume 11- Conshuction Sformwa(er Pollution Prevention 4-15 <br /> l <br /> IZ <br /> I <br />